Hello, syzbot found the following issue on: HEAD commit: 8a696a29c690 Merge tag 'platform-drivers-x86-v6.8-2' of gi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16753f17e80000 kernel config: https://syzkaller.appspot.com/x/.config?x=9247001bfee478be dashboard link: https://syzkaller.appspot.com/bug?extid=a426cde6dee8c2884b0b compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12c4efc3e80000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16a562f3e80000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/e52b675ecac5/disk-8a696a29.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/4fc98d5eb84b/vmlinux-8a696a29.xz kernel image: https://storage.googleapis.com/syzbot-assets/5d4769a0b908/bzImage-8a696a29.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/d57d4609374b/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+a426cde6dee8c2884b0b@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================== BUG: KASAN: slab-out-of-bounds in mi_enum_attr+0x850/0x9e0 fs/ntfs3/record.c:246 Read of size 4 at addr ffff88807483335d by task syz-executor171/9769 CPU: 0 PID: 9769 Comm: syz-executor171 Not tainted 6.8.0-rc1-syzkaller-00356-g8a696a29c690 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:377 [inline] print_report+0x163/0x540 mm/kasan/report.c:488 kasan_report+0x142/0x170 mm/kasan/report.c:601 mi_enum_attr+0x850/0x9e0 fs/ntfs3/record.c:246 mi_find_attr+0x1c5/0x2b0 fs/ntfs3/record.c:353 ni_find_attr+0x609/0x8d0 fs/ntfs3/frecord.c:218 ntfs_readlink_hlp+0xa6/0xcb0 fs/ntfs3/inode.c:1922 ntfs_get_link+0x79/0x110 fs/ntfs3/inode.c:2068 pick_link+0x638/0xd70 step_into+0xc9f/0x1080 fs/namei.c:1871 open_last_lookups fs/namei.c:3588 [inline] path_openat+0x187c/0x31e0 fs/namei.c:3795 do_filp_open+0x234/0x490 fs/namei.c:3825 do_sys_openat2+0x13e/0x1d0 fs/open.c:1404 do_sys_open fs/open.c:1419 [inline] __do_sys_open fs/open.c:1427 [inline] __se_sys_open fs/open.c:1423 [inline] __x64_sys_open+0x225/0x270 fs/open.c:1423 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f1b33964c19 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 81 1d 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f1b338d3218 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007f1b33a06708 RCX: 00007f1b33964c19 RDX: 0000000000000065 RSI: 0000000000000080 RDI: 0000000020000440 RBP: 0000000000000020 R08: 0000000000000000 R09: 0000000000000000 R10: 00007ffcb7e5f0f7 R11: 0000000000000246 R12: 00007f1b33a06700 R13: 00007f1b339d2024 R14: 0030656c69662f2e R15: 0031656c69662f2e </TASK> Allocated by task 5096: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x70 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:372 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:389 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:3981 [inline] __kmalloc+0x22e/0x490 mm/slub.c:3994 kmalloc include/linux/slab.h:594 [inline] tomoyo_realpath_from_path+0xcf/0x5e0 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x2b7/0x730 security/tomoyo/file.c:822 security_inode_getattr+0xd3/0x120 security/security.c:2237 vfs_getattr+0x46/0x430 fs/stat.c:173 vfs_statx+0x1a5/0x4e0 fs/stat.c:248 vfs_fstatat+0x135/0x190 fs/stat.c:304 __do_sys_newfstatat fs/stat.c:468 [inline] __se_sys_newfstatat fs/stat.c:462 [inline] __x64_sys_newfstatat+0x117/0x190 fs/stat.c:462 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b Freed by task 5096: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x70 mm/kasan/common.c:68 kasan_save_free_info+0x4e/0x60 mm/kasan/generic.c:640 poison_slab_object+0xa6/0xe0 mm/kasan/common.c:241 __kasan_slab_free+0x34/0x60 mm/kasan/common.c:257 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2121 [inline] slab_free mm/slub.c:4299 [inline] kfree+0x14a/0x380 mm/slub.c:4409 tomoyo_realpath_from_path+0x5a3/0x5e0 security/tomoyo/realpath.c:286 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x2b7/0x730 security/tomoyo/file.c:822 security_inode_getattr+0xd3/0x120 security/security.c:2237 vfs_getattr+0x46/0x430 fs/stat.c:173 vfs_statx+0x1a5/0x4e0 fs/stat.c:248 vfs_fstatat+0x135/0x190 fs/stat.c:304 __do_sys_newfstatat fs/stat.c:468 [inline] __se_sys_newfstatat fs/stat.c:462 [inline] __x64_sys_newfstatat+0x117/0x190 fs/stat.c:462 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b The buggy address belongs to the object at ffff888074832000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 861 bytes to the right of allocated 4096-byte region [ffff888074832000, ffff888074833000) The buggy address belongs to the physical page: page:ffffea0001d20c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x74830 head:ffffea0001d20c00 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000840 ffff888013042140 dead000000000100 dead000000000122 raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 4500, tgid 4500 (udevd), ts 828902194240, free_ts 828781426813 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1533 prep_new_page mm/page_alloc.c:1540 [inline] get_page_from_freelist+0x33ea/0x3570 mm/page_alloc.c:3311 __alloc_pages+0x255/0x680 mm/page_alloc.c:4567 __alloc_pages_node include/linux/gfp.h:238 [inline] alloc_pages_node include/linux/gfp.h:261 [inline] alloc_slab_page+0x5f/0x160 mm/slub.c:2190 allocate_slab mm/slub.c:2354 [inline] new_slab+0x84/0x2f0 mm/slub.c:2407 ___slab_alloc+0xd17/0x13d0 mm/slub.c:3540 __slab_alloc mm/slub.c:3625 [inline] __slab_alloc_node mm/slub.c:3678 [inline] slab_alloc_node mm/slub.c:3850 [inline] __do_kmalloc_node mm/slub.c:3980 [inline] __kmalloc+0x2dc/0x490 mm/slub.c:3994 kmalloc include/linux/slab.h:594 [inline] tomoyo_realpath_from_path+0xcf/0x5e0 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_check_open_permission+0x255/0x500 security/tomoyo/file.c:771 security_file_open+0x66/0x560 security/security.c:2932 do_dentry_open+0x327/0x1590 fs/open.c:940 do_open fs/namei.c:3641 [inline] path_openat+0x2823/0x31e0 fs/namei.c:3798 do_filp_open+0x234/0x490 fs/namei.c:3825 do_sys_openat2+0x13e/0x1d0 fs/open.c:1404 do_sys_open fs/open.c:1419 [inline] __do_sys_openat fs/open.c:1435 [inline] __se_sys_openat fs/open.c:1430 [inline] __x64_sys_openat+0x247/0x290 fs/open.c:1430 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x230 arch/x86/entry/common.c:83 page last free pid 4500 tgid 4500 stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1140 [inline] free_unref_page_prepare+0x959/0xa80 mm/page_alloc.c:2346 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2486 discard_slab mm/slub.c:2453 [inline] __put_partials+0xeb/0x130 mm/slub.c:2922 put_cpu_partial+0x17b/0x250 mm/slub.c:2997 __slab_free+0x2fe/0x410 mm/slub.c:4166 qlink_free mm/kasan/quarantine.c:160 [inline] qlist_free_all+0x6d/0xd0 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x14b/0x160 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x23/0x70 mm/kasan/common.c:324 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3813 [inline] slab_alloc_node mm/slub.c:3860 [inline] kmem_cache_alloc_lru+0x172/0x340 mm/slub.c:3879 __d_alloc+0x31/0x750 fs/dcache.c:1624 d_alloc+0x4b/0x190 fs/dcache.c:1704 lookup_one_qstr_excl+0xce/0x250 fs/namei.c:1604 do_unlinkat+0x297/0x830 fs/namei.c:4386 __do_sys_unlink fs/namei.c:4446 [inline] __se_sys_unlink fs/namei.c:4444 [inline] __x64_sys_unlink+0x49/0x50 fs/namei.c:4444 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b Memory state around the buggy address: ffff888074833200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888074833280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888074833300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888074833380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888074833400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
